Thai Men and Black Ginger: The PDE5 Mechanism, Documented Trials, and Practical Stack Placement
Also known as Kaempferia Parviflora (Krachai Dum in Thai), Black Ginger is traditionally used in Thailand as a male tonic herb, energy enhancer and longevity agent. Especially touted for its effects on male sexuality. Black Ginger is only grown in South-East Asia, making it an increasingly rare and sought after herb.

